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A person whose near-point distance is 52cm wears a pair of glasses that are 2.2cm from her eyes. With the aid of these glasses, she can now focus on objects 23cm away from her eyes.
Find the focal length of her glasses.
Find the refractive power of her glasses.
A cell has a 7.0-nm-thick membrane with a total membrane area of 6.0\times10^{-9}\;{\rm m^2}, How many sodium ions does this charge correspond to
Laser light at 635 falls on a double-slit apparatus with slit separation 6.9 .Find out the separation between the third and fourth bright fringes, as seen on a screen 1.4 from the slits.
A 45.5-g golf ball is driven from the tee with an initial speed of 40.3 m/s, determine the kinetic energy of the ball at its highest point
A baseball pitcher throws a baseball horizontally at a linear speed of 42.5 m/s (about 95 mi/h). find the tangential speed of a point on the "equator" of the baseball
A 0.330-kg volleyball approaches a player horizontally with a speed of 16.0 m/s. What impulse is delivered to the ball by the player
Phonology: All the data for this problem come from a conservative dialect of Vèneto, a Romance language spoken in northern Italy near the city of Padua.
A particle of mass M moves in one dimension along the positive x axis, under the influence of two forces. The first force is a constant force, with magnitude B and direction toward the origin. The second force is an inverse square law, with magnitude..
A 2 kg object is attached to a spring and placed on a horizontal, smooth surface. A horizontal force of 20.0 N is needed to hold the object at rest when it is pulled 0.200 m from its equilibrium position.
Three 15.53-g Styrofoam balls of radius 2 cm are coated with carbon black to make them conducting and then are tied to 1.15-m-long threads and suspended freely from a common point
Uncompressed, the spring for an automobile suspension is 45cm long. It needs to be fitted into a space 36cm long. how much work does a mechanic have to do to fit the spring
The total electric field consists of the vector sum of two parts. One part has a magnitude of E1 = 1300 N/C, Find the magnitude and direction of the total field
If it takes a fish 0.20s to perform evasive action, at illustrate what minimum height must it spot the pelican to escape? Assume the fish is at the surface of the water.
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